I have a camaster stinger 1 that is about 6 months old that keeps digging into the model portion of the stock. It doesn't do it right away, but eventually a tool path will go too low. What's weird is when I double check the Z the machine still has the same margin it did before, so it doesn't seem to be a persisting issue.

I am generating the GCode from fusion 360 using the included pp. When I preview it in an external G-Code editor, it looks fine. The simulation in Fusion360 looks good as well.

I am assuming I have some sort of ESD issue to do with my dust collector that is right next to the machine. I am using a harbor freight dust collector with 4" vinyl hoses that attack to the z axis. I wonder if its somehow disrupting the servo location?

This issue ONLY happens on the Z axis. Is there a procedure for proper ESD grounding anywhere? I wrapped a wire from the chassis of the dust collector around the hose to the ceiling, but it stops short of contact with the machine.